<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script type="text/javascript">
    var socket;
    if (!window.WebSocket) {
        window.WebSocket = window.MozWebSocket;
    }
    if (window.WebSocket) {
        socket = new WebSocket("ws://localhost:8080/websocket");
        socket.onmessage = function (event) {
            var ta = document.getElementById('responseText');
            ta.value = "";
            ta.value = event.data;
        };
        socket.onopen = function (event) {
            var ta = document.getElementById('responseText');
            ta.value = "打开websocket服务正常，浏览器支持websocket"
        };
        socket.onclose = function (event) {
            var ta = document.getElementById('responseText');
            ta.value = "";
            ta.value = "websocket关闭";
        }
    } else {
        alert("您的浏览器不支持WebSocket！")
    }

    function send(message) {
        if (!window.WebSocket) {
            return;
        }
        if (socket.readyState == WebSocket.OPEN) {
            socket.send(message);
        } else {
            alert("websocket连接没有建立成功")
        }
    }
</script>

<form onsubmit="return false;">
    <input type="text" value="netty最佳实践" name="message"/>
    <br/>
    <input type="button" value="发送websocket请求消息" onclick="send(this.form.message.value)"/>
    <hr color="blue"/>
    <h3>服务端返回的应答消息</h3>
    <textarea id="responseText"
              style="height: 500px;width: 300px;">
    </textarea>
</form>
</body>
</html>